00:01
We would like to calculate the amount of natural gas required.
00:06
Okay, so let's look at our year 1980.
00:11
We need to convert our electricity generation to btu per second.
00:17
So we have 3462399 times 10 to the 9 kwh multiplied by 3412 btu per kwh.
00:33
So this gives us 1 .18 times 10 to the 15 btus.
00:40
Now we need to find our total btus needed by dividing this by 0 .35.
00:50
So we take our 1 .18 times 10 to the 15 divided by 0 .35 to get 3 .37 times 10 to the 15 btus.
01:01
Now this gives us our total number of btus needed.
01:07
Now for our volume, we multiply this 3 .37 times 10 to the 15, divide that by 1000.
01:14
This gives us 3 .37 times 10 to the 12 per cubic feet.
01:20
Now, our mass of our natural gas, we take our 3 .37 times 10 to the 15 btus and divide this by 22 ,000.
01:34
So we get 1 .53 times 10 to the 11 lbm.
01:39
So this gives us our amount of natural gas required.
01:57
So that's for year 1980.
02:02
Now we'd like to calculate it for the subsequent years.
02:11
So if we take a look at our other years, which are 1990, we want to do the same thing for 1990 and all of our other years.
02:32
So you would want to follow the same exact methodology to solve this problem.
02:40
Okay, so this is with a 35 % efficiency for our power plants.
03:01
So now let's go ahead and calculate it for the subsequent years.
03:14
We just want to follow our same steps that we want to do.
03:18
So let's go ahead and calculate it for our next year, which is 1990, where we're told we have 372 .7652 billion...